AMDG: Ad Majorem Dei Gloriam

"Latin: ad majorem dei gloriam = for the greater glory of God. This phrase is used repeatedly by St Ignatius in the Constitutions and his many letters. AMDG has become the unofficial motto of the Society of Jesus and its institutions including the schools. Pupils in Jesuit schools traditionally write AMDG at the top of each piece of work, dedicating it to the greater glory of God."

- From the AMDG to LDS document of the Jesuit Institute London